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ID = 59103
United States of America (USA)
Brand: RCA (RCA Victor Co. Inc.); New York (NY)
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  HEXODE   VHF 
  Late but no serial production. For instance only development samples. *****
Identical to R-1790
Successor Tubes 1939   1630  

Base SPECIAL TUBEBASE in general
Was used by Radar
Filament Indirect

Orbital-beam hexode electron-multiplier VHF amplifier (secondary emission). This appears to be a very early prototype of the 1630 VHF amplifier. Giant acorn body, with 12 equally spaced radial pins.

The code is written by hand, with the date, Aug. 15,'39, and with a series of numbers, 15/4.7 - 16.

This sample comes with its lab built socket and bottom copper shield.

Dimensions (WHD)
incl. pins / tip
55 x x mm / 2.17 x x inch
Tube prices 1 Tube prices (visible for members only)
Information source -- Collector info (Sammler)   
R-1790: Private collection
Emilio Ciardiello


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